Relationships between deflection, settlement and elastic deformation for subgrades and flexible pavements provided by plate bearing tests at Canadian airports - Relations expériementales entre la deflection totale, le tassement et la déflection élastique, des sols de foundation et des revêtements souples, lors d'essais de chargement à la plaque sur des aéroports Canadiens

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TypeArticle
Proceedings titleTechnical Memorandum, Division of Building Research, National Research Council Canada
ConferenceReprinted from "The Proceedings of the Fourth International Conference on Soil Mechanics and Foundation Engineering: 01 August 1957, London
Pages151157; # of pages: 7
AbstractFor its investigation of airport runway design and evaluation, the Canadian Department of Transport employs plate-bearing test procedure that enables deflection, settlement and elastic deformation of the loaded material to be evaluated. Analysis of the load test data indicates that simple relationships exist between deflection, settlement and elastic deformation for the subgrade soils under Canadian airport runways for deflections ranging from 0 to 0·7 in. These relationships arc noticeably different in sandy and in cohesive subgrade soils. Relationships between eflection, settlement and elastic deformation for flexible pavement surface load tests are very similar to those for the subgrade soils on which the pavement has been placed. In all cases, the ratio of settlement to deflection increases, and the ratio of elastic deformation to deflection decreases, as the eflection of the bearing plate under load is increased. Relationships between deflection, settlement and elastic deformation appear to be relatively constant, regardless of the diameter of the bearing plate. For any given total deflection, the ratio of settlement to deflection increases with the number of repetitions of load required to attain that deflection.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-TM-52-5
NRC number21045
NPARC number20386731
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Record identifier689f05c0-e614-4e9e-adb8-09ccfed9579d
Record created2012-07-25
Record modified2016-05-09
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